Bookbinder construction of plastic material



1 March 24, 1953 F. s. SCHADE 2,632,657

BOOKBINDER CONSTRUCTION OF PLASTIC MATERIAL Filed Feb. 2. 1948 2 SHEETS-SHEET 1 FIGJ 4 l4 u r I I I INVENTOR FRANK STANLEY SCI- ADE ATTORNEYS Marqh 24, 1953 F. s. SCHADE 2,632,557

BOOKBINDER CONSTRUCTION OF PLASTIC MATERIAL Filed Feb. 2, 1948 v 2 SI IEETS--SHEET 2 'FIG. 5

INVENTOR FRANK STANLEY SCHADE ATTORNEYS Patented Mar. 24, 1953 umr zo STATES PATENT OFFICE 1 BOOKBINDER CONSTRUCTION OF PLASTIC 'MATERIAL Frank Stanley Schade; Holyoke, Mass, assignor to National Blank Book Company, Holyoke, Mass., a corporation of Massachusetts 'Application February 2, 1948, Serial No. 5,749

- 1 1 This invention relates to an improvement in binder :case constructions madeof plastic material. The newconstruction is particularly useful in ring binders. It is not however necessarily limited to such-use buthasa broader application as will bepointed out.

It is necessary to refer to an example of the inventionto' explain theuseful features of construction and an example is shown in the draw- Fig. 1 shows a plan view of aring binder notebook;

L.Fig;2isabottom.edge view;

Fig. 3 is a detail view indicating an assembly of part of the material in the back portion includingmaterial for the hinge portions;

n Fig. {indicates the material of Fig. 3 assembleed and 'withhinge bands formed adjacent the sideiedgesfi fiFig.5.isaplan,and"

Fig.6 is a crosssectional view-of the covers and back portion subassembly of Fig. 4 about to be put together for the final step of the binder case construction;

flexible'plastic, such as flexible Vinylite sheet plastic, each of one thickness.

The member 5 is made of sheet metal with hollow rivet members 6 and 1 fastened to it and spaced as are holes 8 and 9 in sheet 3. The plastic sheets are of ornamental character available in colored or decoratively embossed material.

The subassembly of Fig. 4 is made by laminating the sheets of Fig. 3. This laminated structure is held together by welding sheets 3 and 4 under pressure along bands I0 and H. These bands i0 and H are hinge bands of flexible material in the finished structure. A cross section of this subassembly is seen in Fig. 6. i

2 Claims (01. 281529) With this subassembly of the back portion material' the covers I and 2 are assembled by inserting the edges of the covers between the open lips 12 and [3 beyond the hinge portions l0 and H at each side of the back portion assembly. These lips l2 and 13 extend not only along each side but also along each end edge of the subassembly as seen in Fig. 4.

After the covers I and 2 are inserted between] the side extensions or lips I2 and.l3,. theplastich material iswelded together underpressure which thins down the cover margins as indicated along the band [2, Fig.7. A weld is made at the time along the end bands 14. This closes all the lip.

portions I2 and I3, with the covers welded between-andmakes a single thickness at the end extensions I 4 and permanently fastens the mate rial together to make the new binder case construction.

Rivet members finishedproduct of the example. r

Instead of using the rivet members '6 andf'l" to fasten on a ring binder mechanism, such members can be used to fasten other types of sheet holding devices to the back portion, such as coil wire binder devices and the like. Instead of having the sheet; metal strip 5 fiat it may. be f curved in cross section to make a curved back sheets 3 and 4 of Fig. 3, withQthe sheet metal strip 5 held centrally between them, may be welded to stiff plastic covers I and 2 along bands l2 (Fig. 8). In this case the flexible material of sheets 3 and 4 between the sheet metal strip 5 and the welded bands I2 will act as hinge bands in the finished structure. The hinge bands It and H (Fig. 7) will be absent then in the final product (see Fig. 8). A weld is made, however, along the end bands I4 at the same time as the welded bands l2 are made so as to close off these ends. The main example first described is the preferred form but for one reason or another the modified example of Fig. 8 may he wanted and when used embodies the invention from its broadest aspect. 7

It will be noted from what has been said that the new binder case construction has these features of advantage. It is easy to make up as a low cost high quality binder of fine appearance. The main feature of the construction is seen 1n the parts which are in the subassembly of the back portion and their relation to one another which adapt them for the function of the back and hinge portions and for joining with the covers, all resulting in the improved binder assembly, the hinge bands l0 and H, when they 6 and! are spaced to receive the metalf of the ring. binder mechanism" l5 seen in Fig. 1. Itis mounted on the rivets and they are headed over as shown in Fig. 1 for the are made as shown in Fig. 4, provide the open lips l2 and I3. The covers I and 2 are put in between these lips and can be fastened down most conveniently after the hinge bands are made. The time thecovers are welded integrally in place between their holding lips in the back portion, is the most convenient time to finish off the laminated back portion all around its perimeter as by the welded perimeter band margin made up of side portions l2 and end portions 14 to make the simple neat appearance in the material as built into the new construction.

The result is the low cost, high quality, and fine appearing binder construction of the invention.

What I claim is:

1. A binder construction made with a back 7 portion having two flexible sheets of plastic ma terial and a stiffener strip 'of smaller area laminated between them, spaced pins mounted in said strip and extending through one sheet for fastening a sheet binder device to the back portion, two covers of plastic material one on each side'of the back portion with the inner marginal side edge of each cover located between the outermoste'dge portions of the side margins of the flexible material and welded therewith in laminated form, said covers being thinned down along said marginal weld; said back portion having-its, end edges flush with edges of the covers, a flexible hinge band made by a welding of portionsof the flexible sheet material together between the side edges of the said stiffener strip and the cover material and a welded band of the flexible material at'each end portion of the back portion.

2. A binder'construction made of two cover sheets of stiff plastic material and a back portion joining the cover sheets and made of two laminated sheets of flexible plastic material with a, smaller sheet of s'tifiening material between the sheets of flexible material, said flexible sheets having marginal edge portions extending beyond the stifiener material and meeting at their outer edges the inner edges of said cover sheets, separate hinge bands positioned on each side of said stiifener material to enclose the same and consisting of flexible material of single thickness is welded form made from the material of the two flexible sheets along such hinge bands, the outermost marginaledge portions of said flexible sheets forming short lips enclosing between them the innermost marginal edge portions of the stiiT cover sheets, said lips being welded with the cover sheet to form a laminated border for each side of the back portion of flexible material,- each cover sheet being thinned down in said laminated border, said hinge bands and said laminated borders being in spaced relation and each having between them a strip inwardly of each side of the laminated border with said two flexible sheets separated, said flexible sheets at the end edges thereof being flush with the edge portions of the cover sheets, and in said end edge portions being welded into a single band of single thickness between the two cover portions to form with said welded side borders a welded band around the perimeter margin of the flexible sheets.

FRANK STANLEY SCHADE? REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS I Schade Dec, 4, 1945 

